Accounting machine



Nov. 29, 1938. J. T. DAVIDSON ACCOUNTING MACHINE Filed Aug. 2, 1957 7 Sheets-Sheet John T. Davidson Inventor y %M W His Attorney J. T. DAVIDSON ACCOUNTING MACHINE Nov. 29, 1938.

Filed Aug. 2', 195'! 7 Sheets-Sheet 2 i /yam Hi Gttorneg Filed Aug. 2, 1937 v '7 Sheets-Sheet 3 John T. Davidson Nov. 29, 1938. -J. T. DAVIDSON ACCOUNTING MACHINE '7 Sheets-Sheet 4 Filed Aug. 2, 1957 3nvento1: John '1'. Davidson Hi; (Ittorneg I 29, 1938- J. T. DAVIDSON ACCOUNTING MACHINE 7 Sheets-Sheet 5 Filed Aug. 2, 1937 Nov. 29, 1938. J. T. DAVIDSON ACCOUNTING MACHINE Filed Aug. 2, 1957 '7 Sheets-Sheet 6 Ihwentor John T. Davidson HIS Gttomeg 3 J. T. DAVIDSON ACCOUNTING MACHINE Filed Aug. 2, 1937 7 Sheets-Sheet 7 ."Snnentor John T. Davidson His Gttomeg Patented Nov. 29,1938

Parent ort'ics 2,138,482 accopm'mc momma John T. Davidson, Dayton, Ohio, assignor a The National Cash Register V Compa y, Dayton, Ohio, a corporation of Maryland Application August 2, 193?, Serial No. 156,865

4% @laims.

This invention relates to accounting and analogous machines and is particularly directed to throat-opening devices for the front feed carriages of such machines. I

a In order to expedite the handling of complex business systems, -most present-day accounting machines are pr'ovidedwitha front feed. traveling carriage in which the platen may be rocked from printing position to a more accessible position for the insertion of record material therearound. The throats of such front feed platens may be opened automatically or manually, and when opened permit the record material, which generally consists of wide ledger sheets, to be it; inserted at the front of the platen and pushed there-around until the proper line of said ledger sheet is located in relation to the printing mechanism by means of a line-finding device, which moves to efi'ective position when the throat is opened. Obviously, ledger sheets upon which entries have been made may be simply pulled from the open throat of the front feed platen.

In large business concerns hundreds of ledger sheets are handled during a single business period and to facilitate the handling of these ledger sheets, the accounting machines areprovided with automatic means for opening the throat of the front feed platen after the entries have been made upon the ledger sheet. Incertain types of accounting machines the moving of the traveling carriage into a certain columnar position causes the throat to open automatically. In the machine embodying the instant invention the moving of the traveling carriage to certain col- 85 umnar positions has no control over the throat opening mechanism other than the actuation of a latch which looks the releasing mechanism against operation when the carriage is out of any one of its columnar positions. The present 40 invention is directed to automatic means under control of the machine control keys for causing the throat to open automatically, depending upon which control key is depressed. Any number of control keys may be arranged to'cause the 4.5 throat ,to open automatically. Manipulative means is provided for rendering the control of the throat opening by the control keys ineffective.

In addition to the above automatic means for opening the throat of the front feed platen, it is also desirable to be able to open the throat at u, Therefore it is broadly an object of this in vention to provide means for automatically opening'the throat of the front feed platen, said means not being dependent upon the columnar positioning of the traveling carriage, nor dependent upon said carriage in any way. 5

A more specific object is the provision of means rendered effective by the depression of certain control keys for causing the throat of the front feed carriage to open automatically.

Another object of this invention is to supply 10 means whereby the control keys may be rendered inefiective to control the opening of the furnish means, independent of the control keys, l5

for causing the throat of the traveling carriage to open at will, irrespective of the columnar position of said traveling carriage.

With these and incidental objects in view the invention includes certain novel features of con- 20 struction' and combinations of parts, the essential elements of which are-set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part 25 of this specification.

In the drawings:

Fig. 1 is a perspective view of the front feed traveling carriage of the machine of the present invention.

Fig. 1A is a perspective view of one set of pressure rollers for holding record material in contact with the platen roll. V

Fig. 2 is an elevation, as observed from the right of the machine, illustrating the mechanism 35 that controls the opening of the throat of the front feed carriage.

Fig. 3 is a perspective view of the mechanism that controls the opening of the throat of the front feed carriage. y

In views such as Fig. 3, showing the framework in phantom, where the dot and dash lines of the framework do not show in back of the full-line parts, it indicates that such parts are in front of the framework. 4

Fig. 4 is a detail view of the symbol type sector control bar and the cam arm associated therewith, which positions said bar in overdraft oper ations.

Fig. 5 is a detail view of the cam and the. arm associated therewith which control themgagingof the overdraft storage device with the actuators.

Fig. 6 is a right-hand end view of the traveling carriage showing the throat closed. 66

Fig. 7 is a right-hand end view of the-traveling carriage showing the throat open.

Fig. 8 is a sectional view of the traveling carriage showing the throat closed.

Fig. 9 is a sectional view of the traveling carriage showing the throat open.

Fig. 10 is a fragmentary end view of the ratchet and associated mechanism that controls the linespacing of the platen roll.

Fig. 11 is a detail view of the mechanism that automatically line-spaces the platen roll.

Fig. 12 is a right side elevation of a portion of the machine illustrating the mechanism that causes the machine to operate and simultaneously renders the throat opening mechanism Fig. 13 is a perspective view showing in detail a part of the mechanism illustrated in Fig. 12.

Fig. 14 is a detail view of the mechanism that locks the machine against operation when the throat of the front feed carriage is opened, or when certain of the record materialhas been exhausted. i

Fig. 15 is a sectional view of the platen showing the feeler mechanism that locks the machine against operation when certain of the record material is exhausted.

Fig. 16 is a detail view of the mechanism that controls the opening of the throat of the front feed carriage.

Fig. 17 is a detail view of the overdraft key and a part of the. mechanism associated therewith to control operation of the machine in overdraft operations.

Fi 18 is a detail view of the mechanism that drives the overdraft control shaft and earns in overdraft operations.

General description The instant invention is shown applied to the well known Ellis type of accounting machine which has a plurality of numeral keys, the depression of which positions slidable racks or actu- I operation, it is believed unnecessary to go into a detailed description thereof at this time. Therefore, in this specification only the mechanism pertinent to the instant invention will be described in detail. However, for a detailed description of the entire machine reference maybe had to the following United States Patents Nos. 1,197,276 and 1,197,278 issued September 5, 1916, to Halcolm Ellis; No. 1,203,863, issued November 7, 1916, to Halcolm Ellis; No. 1,819,084, issued August'18, 1931, to Emil John Ens, and No. 2,038,717 issued April 28, 1936, to R. A. Christian.

In the present-day business world, accounting or bookkeeping machines of the Ellis type are used by large mercantile concerns in the balancing of individual charge accounts, by banking establishments in the balancing of individual checking accounts, and by various other businesses in various ways. As a general rule it is the practice of such business concerns to balance active accounts daily.

depositor upon which the daily balancing of his account takes place. A record of the days work is generally kept on a journal sheet which, together with its superimposed carbon paper, is first wound around the platen roll. As the Journal sheet remains in the machine during the entire days run, it is inserted at the rear of the platen and wound there-around by means of pressure rolls until its top edge passes beyond the printing line. As there are generally a large number of accounts to balance and consequently a large number of ledger sheets to be handled, it is necessary to provide means whereby the ledger sheets may be quickly inserted in the machine, located in proper relation to the printing line, and after the balancing of a particular account is completed, the ledger sheet may be quickly removed from the machine with the least amount of effort consistent with speed and accuracy.

To accomplish this result the machine embodying the instant invention is equipped with ,a traveling carriage having a frontfeedthroat which is opened for the insertion of ledger sheets when the platen is automatically rocked or tilted upwardly awayfrom printing position to front feeding position. Simultaneously with the opening of the throat the combined front-feed guide and line finding device is rocked into guiding position, and after the platen has completed its movement away" from printing position the pressure rolls are automatically disengaged therefrom to permit the ledger sheet, which has been audited, to be removed from the machine. Thereafter another ledger sheet is inserted in the open throat and pushed around the platen roll until the proper line is located, after which the throat is closed by a hand lever conveniently located on the traveling carriage frame.

Insertion and removal of ledger sheets does not disturb the journal sheet .and its superimposed carbon, as they are held in contact with the platen by auxiliary pressure rolls which are not released when the platen is rocked to open throat position.

An interlocking mechanism is provided between the platen and the machine release mechanism which prevents operation of the machine when the platen is in open-throat position. A feeler mechanism cooperating with this same interlock-- ing mechanism locks the machine against operation when the endof the journal sheet nears the printing line and serves as a warning to the operator that almost all the usable space of the journal sheet has been exhausted.-;.

The machine embodying the instant invention is provided with a conventional tabulating mechanism for controlling the positioning of the traveling carriage in relation to the several columns on the ledger sheet. The usual vertical feeding mechanism is employed to rotate the platen to line-space the record material.

The mechanism that operates the machine also operates the throat-opening mechanism. Depressing certain of the control keys causes the throat-opening mechanism to be connected to the machine operating mechanism, whereupon operation of the machine automatically opens the throat of the traveling carriage. In the present machine the control keys are located in a row at the left of the keyboard and depressing any one of these keys positions a slidable control bar, which in turn positions a printing sector to print a symbolcharacteristic of the type of opjournal sheet.

area lea eration being performed. The control keys also position an arm commensurate with the position of the symbol printing sector, after which an aligning arm, having a notch therein for each position of the symbol sector, engages the arm to lock the sector against displacement. If it is desired that a certain control key causethe throat to open, the aligning notch in the aligning lever corresponding to that particular key is made deeper than the other aligning notches, thereby permitting additional aligning movement of the lever. This additional movement of the aligning lever causes the throat-opening mechanism to be connected to the machine operating mechanism upon subsequent operation of the machine and consequently the throat 'of the traveling carriage opens automatically, Any number of the control keys may be arranged to cause the throat of the carriage to open in the manner set out above. The overdraft key also positions the controlbar to position the symbol sector so that an overdraft symbol will beprinted. Cousequently this key may also be arranged to cause the throat ofthe carriage to open.

A manupulative lever is provided for shifting a plate, mounted upon the aligning lever, to partially close the deep alining notches in said lever to render. the control keys and the overdraft key ineffective to open the throat of the carriage. This manipulative lever is provided with a latch for retaining said lever in effective position when desired.

The machine embodying the present invention is also provided with an auxiliary motor bar,

depression of which, in addition to setting the machine in motion, also causes the throat-opening mechanism to be connected to the machine operating mechanism, thereby causing the throat to be opened automatically.

The mechanisms outlined above, for automatically opening the throat are not dependent in.

Mechanism pertinent to the instant invention will now be described in detail.

Detailed description Referring to Figs. 1, 2, 6 and 8, a traveling carriage 30 is mounted to slide laterally upon ways on a machine case 3|, which encloses the mechanism of the machine and is secured to a machine base plate 34. The framework of the carriage -3|) 'supportsa platen carrying frame composed of end plates 32 and 33 connected by tie rods (not shown) and a rear table 36 for the the carriage 30 is a rod 31 having pivoted thereon platen carrying frame arms 39 and 40, the upper ends of which are bifurcated to embrace support studs 4| and 42 for the table 36. Said'studs aresecured in the plates 32 and 33. The lowerends of the arms 33 and 43 are hook-shaped to receive a platen shaft 43 carrying a platen roll 44. Loose $5. Secured in opposite ends of the framework of.

Secured in the framework of shaft 43 in the hooked ends of said arms. Thus it is evident that the platen is removably and pivotally mounted within the traveling carriage framework by the arms 39 and" and'the collars tively, fast on a shaft 56 journaled in the end plates 32 and 33 of .the platen frame. Also secured on the shaft 55 (Figs. 6 and 8) are arms 51 and 58, the lower end of .each having a cam slot 59 arranged to cooperate with rollers BI and 62 carried by arms 63 and 64 secured on a shaft 65 journaled in the end plates 32 and 33.

Secured on the shaft 65 is a plurality of arms 66 (Figs. 1A, 6, 8 and 9), supporting a rod l0, which cooperates with extensions ii on a series of tension arms 32 loosely mounted on the shaft 65. The arms I? are arranged along the shaft 65 in pairs connected by studs 13 upon which are pivoted arms 73 connected by studs 75, having rotatably mounted thereon pressure rollers 15. Each pressure roller assembly has a shield 11 carried by the stud 13, which facilitates the insertion of paper around the platen 44 and assists in retaining the pressure roller assembly intact. Therefore it will be observed that each pair of arms 12 carries a pressure roller assembly consisting of a shield TI and two pressure rollers 16 supported by the arms 74 upon the stud 13. As previously explained, the pressure roller assemblies pivot on the studs (3, thereby allowing the rollers of each assembly to adjust themselves so that they properly engage the platen 44. This pivoting movement is limited by tenons on the stud i5 cooperating with enlarged holes '88 in the arms 12.

Encircling the shaft 65 is a series of torsion springs '59, (Fig. 1A) which in cooperation with the arms 12 and adjusting collars 30: secured on the shaft 65 by set screws 8|, urge the pressure rollers 16 into contact with the platen roll 44.

The collars 80 permit the proper degree of tension to be applied to the torsion springs 19.

Directing attention to Figs. 6 and '1, the arm 51 has a roller "82 adapted to cooperate with a camming surface 83 on a lever 84 carrying a trunnion 85 journaled in a bushing (not shown) carried by-the plate 32. The lever 84 has on its lower edge a projecting surface 86 arranged to cooperate with a stud 81 carried by a locking arm 88 looselymounted on the shaft 56. The rearward end of the arm 88 has a radial surface 39 concentric with the shaft 31 and terminating in a notch 90. The radial surface 89 and notch Bll are adapted to cooperate with a roller 9| rotatably mounted on a bracket 92 secured to. the traveling carriage frame 30. The bracket 92 has an extension v93 in the path of the stud 4|, to

stop the platen carrying frame at the terminus .of its'movement away from printing position.

- The platen carrying frame is rocked I away from printing position by the arms 49 and 53,

which are rocked clockwise asviewed in Figs. 3

and '6 by mechanism to be described later. As the arms 49 and50 are rocked, their bifurcated ends cooperating with the studs 52 and 53 in the arms 54 and tend to rock the shaft 53 and, 'the arms 51 and 58 clockwise from th e' position shown in Fig. 6 to the position shown in Fig. 7,

but such movement is very slight, as it is interrupted by contact of the radial surface 89 of the that shown in Figs. 7 and 9, until the notch 'a bracket 99 secured to the frame 30 for the As the platen is rocked to" is in alinement with the roller 8 I, at which time the arms 51 and 58are free to move relatively to the platen carrying frame. Consequently, continued movement of the levers 49 and 50 causes the roller 82, in cooperation with the cam surface 83, to rock the arm 84 counter-clockwise and the arm 88 clockwise to engage the notch with the roller 9|, to effectively lock the platen carrying frame in open-throat position as shown in Figs. 7 and 9.

When the shaft 56 rocks independently of the platen carrying frame to lock said platen carrying frame in open-throat position, the slot 58 (Figs. 1A and 8) in the arms 51 and 58 cooperate ing with the rollers BI and 62 rock the shaft 65 counterclockwise causing the rod I0 to rock the arms I2 counter-clockwise to disengage the pressure rollers 16 from the platen roll 44.

A stud 94 (Figs. 1 and 6) in the arm 54 en gages a slot in a link 96 pivoted to an upward extension of a lever 91 fulcrumed on a stud 98 in traveling carriage. front feeding position, the stud 94 in cooperation with the end of the slot 95 rocks the lever 81 clockwise as viewed in Fig. 6. After the audited ledger sheet hasbeen removed from the openthroat and a new ledger sheet inserted therein, the platen may be returned to printing position by pushing downwardly on a fingerpiece I00 of the lever 91. This rocks the rollers 82 out of engagement with the surfaces 83 on the arms 84 to permit the latch 88 to be spring-returned counter-clockwise to disengage the notch 90 therein from the stud 8I. Return movement of the shaft 56 also returns the pressure rollers I6 to effective position to press the ledger sheet against the platen roll to prevent displacement of said ledger sheet while, the platen is returning to printing-position. After the latch 88 has been moved to ineffective position continued pressure on the fingerpiece I00 starts the platen carrying frame on its return journey to printing position. This overbalances the platen carrying frame, thus causing the momentum thereof, coupled with gravity, to return said platen carrying frame to printing position, as shown in Figs. 6 and 8.

Automatic throat opening mechanism The present invention provides means for automatically rocking the platen from its normal or printing position to front feeding or openthroat position during'the operating cycle of the machine. Such means is operated from the ma chine driving mechanism and may be controlled ing maintained in rigid relation to each other by means of a cross-frame I08 and various other cross-frames, bars and rod (not shown). Journaled in the frames I05 and I06 is-a main drive shaft I09 having secured on the right-hand end thereof an arm II 0 connected by a link III to the driven member II2 (Fig. 12) of a clutch device, said driven member adapted to engage a driving-member II3 geared to a conventional type of continuously running electric motor I01 supported by a housing I I4 secured to the machine base I01.

' For a detailed description of the driving motor and clutch mechanism reference may be had to Patent No. 1,601,102, issued September 28, 1926, to F. W. Bernau.

The arm H0 (Fig. 2) carries a, stud II5, which is engaged by a notch in the lower end of a link II6, the upper end of which is pivoted to an arm II'Iyieldingly connected to an arm II8 secured on the right-hand end of a printer shaft II9 journaled in the frame I05 and the printer framework (not shown). Secured on the shaft II 9 is an arm I20 carrying a stud I2I adapted to cooperate with a notch I22in the lower end a of a bar I23, the upper end of which is pivoted to a crank I24 secured on a shaft I25, opposite ends of which are journaled in the frames I05 and I08 (Fig. 3). Also secured on the shaft I25 is a finger I2I which cooperates with the rod 5! to move the platen to front feeding position,

A stud I3I in the plate I29 is embraced by an upward extension of a multi-armed lever I32 pivoted on a stud I 33 in the frame I05, whereby counter-clockwise movement of said plate rocks said lever I32 clockwise. Clockwise movement of the lever I32 disengages 'a stud I34 in an extension thereof from a shoulder on a bell crank I35 pivoted on a stud I36 in the frame I05. The bell crank I35 ispivotally connected to the forward end of a pitman I31, the rearward end of which is bifurcated to straddle av mediately rocks the lever I40 counter-clockwise to engage the clutch driven member with the clutch driving member. It requires one revolution of the clutch driven member to oscillate the arm I I0 (Fig. 2) through one-cycle of movement and after this movement has been completed a roller (not shown) on the clutch driven member restores the arm I40 and the bell crank I35,

whereupon the spring I M, one end of which is connected to the plate I29, returns the stud I34 .into the path of the shoulder on the bell crank I 35 to obstruct releasing movement thereof. In case the starting bar I28 is accidentally or inadvertently retained depressed, at the end of machine operation, the usual non-repeat device prevents repeat operations of the machine.

As pre viously explained, the notch in the link IIG (Fig. 75

2) is normally engaged with the stud H in the arm H6 and consequently the printer shaft I as is rocked in unison with said arm I! first clockwise and then back to normal position.

Normally a latch I42 (Figs. 2 and 16) pivoted on a stud I43 in the frame I05, in cooperation with a stud I44 in the bar I23, holds said bar against the action of a spring M5, tensioned between said bar I23 and the arm I26, when the stud IZI moves opposite the notch I22, to prevent said notch from engaging said stud. However, various means, now to be described, are provided for rocking the latch IE2 out of engagement with the stud III! to permit the notch I22 I to engage the stud I2I whereupon return movement of the shaft H9 and the arm I2Il rocks the shaft I25 and the finger I21 counter-clockwise from the positions shown in Figs. 6 and 16 to the position shown in Fig. 7, which by means of the rod 5i (see also Fig. 3), in cooperation with the arms 89 and 56, rocks the platen carrying frame clockwise to open the throat of the front-feed carriage in the manner explained above. After.the throat has been opened, an

extension I46 of'the link I23 engages an obstruction which prevents further movement of said link in unison with the arm I20, whereupon the stud I2I rides out of the notch I22 thereby permitting the spring I45 to return the link I23, the shaft I25 and finger I21 to normal positions, as shown in Fig. 16.

Control of throat opening by total keys One means of controlling the latch I42 for the throat-opening mechanism (Figs. 3, 4 and 16)- is by means of aserles of total control keys Hi1 located on theleft-hand side of the keyboard. The total control keys I51 select and condition their respective totalizers for total operations,

and when used in conjunction with. a. sub-total key I58 select and condition their respective totalizers for sub-total operations. The keys M1 and Idd are mounted toslide vertically in the framework of the keyboard and are retained in upward or undepressed position by means of compression springs (not shown), which position is determined by shoulders on the upper ends of the stems of said keys in cooperation with the keyboard top plate (not shown). The lower ends of the stems of the keys I411 cooperate with angular camming lugs III on a control bar I50 mounted for horizontal sliding movement by means of slots therein in cooperation with studs I 5I secured in the frame I66. A link 1511 (Figs. 2, 3

and 4) connects the bar I56 to a crank I58 se-' cured on one end of a shaft. I59 journaled in the frames I65 and I06. Secured on the other end .of the shaft I59 is a curved arm I66 connected by a link I6I to an arm I62 (Fig. 16) fulcrumed 1 ing machine operation, by a stud I68 (Figs. ,2

and 16), in the arm I62, in cooperation with a deep notch I61 or one of several shallow notches I69, corresponding to the different total keys, in an alining lever I10free on a stationary stud I1I. Upon operation of the machine, initial rock said lever counter-clockwise.

movementclockwise of the printer shaft IIQ and an arm I12, integral therewith, withdraws a stud I13 in said arm from an extension of the alining lever I10, permitting a spring I14 to rock said lever clockwise'to engage the corresponding notch 161 or I69 with the stud I66 to lock the symbol sector I65 in set positon.

, If the arm I62 is positioned so that the stud I66 is opposite the deep notch I61 the lever I12 will move sufiiciently to cause a stud I15 in an cxtension'thereof to engage a lever I16 fast on' a short shaft I11 journaled in the frame I65 and Counterclockwise movement of the lever IFIE causes a stud 418, in a rearward extensioni thereof, in cooperation with a U-shaped slot in an extension of the latch I42, to rock said latch clockwise out of engagement with the stud I45, whereupon the spring I45 moves the notch I22 in the bar I23 into the path of the stud I2I. Return movement counter-clockwise,of the printer shaft IIQ and the arm I28 causes the stud I2I to engage the notch I22 to rock the shaft I and the finger I22! counter-clockwise to open the throat of the carriage in the manner explained above.

Return movement counter-clockwise of the shaft HQ and the arm I12 causes the stud I13 sub-overdraft operation the same time, the stud I2 I rides out of the notch I22,

releasing the bar I23 to the action of the spring M5, which immediately returns said bar and connected parts,including the finger I21, to normal position, as shown in Fig. 16, whereupon the latch I412 is returned by gravity into engagement with the stud Hid. There is a notch in the aliner I16 for each of the total keys I41 (Fig. 3) and obvi-' ously any or all of these notches may be cut deep to render the automatic throat-opening mechanism efiective. However, as presently arranged the notch I5? for the No. 1 or balance key is cut deep, and consequently renders the automatic throat-opening mechanism efiective.

Overdraft key control of throat-opening The machine embodying the present invention is equipped'with an automatic overdraft mechanism that transposes the complementary amount of an overdraft into a true negative amount and prints either a total or a sub-total of this true negative amount upon the record material. In a complementary amount of the overdraft is reentered in the balance totalizer in preparation for further computations in connection therewith.

Overdraft operations are initiated by the deprssion of an overdraft key I19 (Figs. 2 and 1'!) which also conditions the machine for said overdraft operations. In the present lmachine an overdraft operation consists of four cycles of opnegative amount in said balance totalizer. Dur-' ing the third cycle of an overdraft operation the balance. totalizer is again clearedand the true mounted upon the stud I33.

the previously cleared storage device and in the fourth cycle the storage device is again cleared and'the true negative amount of the overdraft is printed upon the record material. In sub-overdraft operations the complement is reentered in the balance totalizer during thefourth cycle.

In order to prevent undesirable and erroneous entries from being made upon the record material during the ,transposing cycles ofan overdraft operation, the printing mechanism is rendered inoperative during the first three cycles of said overdraft operation and is rendered effective during the last cycle to print the true negative balance. During the printing cycle of an overdraft operation the slide I50 (Fig. 3) is shifted forwardly in a manner presently to be described, to

position the symbol printing sector I65 (Fig. 2) to print a symbol characteristic of said overdraft operation upon the record material. an alining notch in the aliner I18 (Fig. 16) corresponding to the'position of the symbol sector in overdraft operations, it is possible to control the opening of the throat in overdraft operations in exactly the same manner as explained for the total keys I41 (Fig. 3). l

The portion of the overdraft mechanism essential to a proper disclosure ofthe present inven tion will now be described in detail.

Depressing the overdraft key I19 (Fig. 2) rocks a latch I86 out of engagement with a bent-over ear on a lever I pivoted on the 'stud I36, releasing said lever to the action of a strong spring, which immediately rocks said lever clockwise. The lever I80 is connected by a link IBI to the plate I29. Consequently clockwise movement of said lever carries the plate I29 counter-clockwise in unison therewith to disengage the stud I34 from the shoulder of the arm I35 to set the machine in motion in the. manner explained previously. Clockwise movement of the lever I80 also withdraws a surface I82 thereof from a stud I83 in a hook I84, whereupon a spring I85 en-' gages said hook with the stud I34 to prevent said stud from engaging the shoulder of the arm I35 when said arm is restored at the end of eachcycle of operation, thereby causing the machine to cycle automatically. In the last cycle of an overdraft operation the lever I88 is restored counterclockwise into engagement with the latch I86, which movement moves the hook I 84 out of engagement with the stud I34 to permit said stud to engage the shoulder of the arm I35 to terminate cycling of the machine.

Depressing the overdraft key I19 (Figs. 17 and 18) causes a stud I81 therein, in cooperation with a slot in a pitman I88, pivoted to a crank I89,

secured to the main shaft I89, to engage a notch I98 in said pitman with a stud I9I in a slide I92 mounted for horizontal reciprocation by means- I93 and I94 urged by a spring I95 into engagement with the teeth of their respective ratchets -I96 and I91, said ratchets being an integral part of the overdraft cam assembly which is rotatably cycle of an overdraft operation. Consequently during the four cyclesfof an overdraft operation the overdraft cam assembly is, driven one com- As there is is of no effect.

The push-pull acplete revolution, during which it controls the action ,of the machine to properly effect an overdraft operation. A spring-pulled retaining pawl I98 (Fig. 18) in cooperation with the teeth of to the printer operating link II6, shifts said link II6 out of engagement with the stud H5 in the arm H0 and shifts anotch 205 therein into engagement with a stationary stud 206. This disengages the drive of the printer shaft II9 from the arm H8, and consequently all the mechanism operated by said printer shaft, including the automatic throat-opening mechanism, remains inoperative at this time. During the third cycle of an overdraft operation the lever I80 is returned counter-clockwise, as explained hereinbefore and is reengaged by the latch I86, which movement of said lever I80 reengages the link II6 with the stud I I5, so that the printer mechanism will function during the final or fourth cycle of an overdraft operation to print the true negative amount of said overdraft.

Sub-overdraft operations are initiated by a sub-overdraft key 204 (Figs. 2, 3 and 17) depression of which causes the machine to function in exactly the same manner as explained in connection with the overdraft key I19, the only difference being that during the final cycle of a sub-overdraft operation the complementary amount of the overdraft is reentered in the balance totalizer so that further computations may be carried on in connection with this particular balance.

Integral with theratchets I96 and I91 (Figs. 5 and 18), and moving in unison therewith, is a cam 201 which controls the engagement of a storage device with the amount actuators during overdraft operations. The periphery of the cam 281 cooperates with a roller 288 on an arm "209 secured .on a shaft 2I0 (Figs. 3, 4 and 5) Journaled in the frames I05 and I06. Also secured on the shaft 2I0 is a cam arm 2 having a camming surface 2I2 which cooperates with'a stud 2I3 in the control bar I50. 2I4 and 2I5 of the cam 201 rock the shaft 2I0 andv the arm 2 counter-clockwise against the action of a spring 2I6 during an overdraft or a sub-overdraft operation. Counter-clockwise movement of the arm 2 causes the camming surface2|2 to shift the bar I50 forwardly to position the symbol sector I65 (Fig. 2) to print a symbol characteristic of an overdraft or a suboverdraft operation. Inasmuch as the high surface 2I4 of the cam 281 positions the bar I50 and the symbol sector I65 during the first and second cycles of an overdraft operation, at which time the printer mechanism is disabled, this positioning However, the surface 2 I 5 positions the bar I50 and the sector I65 during the third and fourth cycles of an overdraft operation, which positioning moves the stud- I68 in the arm I62 (Fig. 2) opposite anotch 2I1 (Fig. 16) in the aliner I10.

Initial movement clockwise of the shaft I I9 and the arm I12 permits the aliner I18 to move clockwise to engage the notch 2I1 with the stud I68, under influence of the spring I14. As the notch 2I1 is a deep notch, it permits the stud I15, in

Similar high portions greases the aliner H179, to rock the lever we counter clockwise to move the latch I42 out of 'engagement with the stud I44 to permit the spring'i45 to move the notch I22, in the link I23, into engagement with the stud !2!, whereupon return movement counter-clockwise of the shaft I I9 and the arm I20 rocks the shaft I25 and the finger I22 counter-clockwise to open the throat of the front-feed carriage in the manner explained earlier herein. 7

It is to be understood that the arm I52 and the sector I65 are moved to the same position in both overdraft and sub-overdraft operations. Obviously, if it is undesirable that the overdraft and sub-overdraft keys cause the throat to open automatically the notch 2!? may be cut shallow as are the notches i853.

Manipulative means is provided for rendering the automatic throat-opening mechanism inoperative. This means includes a plate 2I2 (Figs.

2 and 16) slidably mounted on the lever I by means of slots therein in cooperation with studs 2W in said arm I19. The plate 2I8. has notches 203 therein corresponding to the notches ltl', E69 and 2H, and said notches 203 are retained in alinement with the notches in the lever I'Hl by a spring 226, tensioned between the lever lid and the plate 2I8 to urge said plate upwardly. The plate 2I8 carries a stud 22! which cooperates with an arcuate surface 222 on the bottom of a lever 223 pivoted at 224 to a bracket mounted on the machine case 36. v

Depressing the lever 223, by means of a convenient fingerpiece 225 thereon, shifts the plate 258 downwardly to move, the projection formed,

by the adjacent notches 2B3 therein into register with the notches I61, I168 and 2M to render allof said notches shallow so that the aliner Ill] will not receive maximum movement in any position said lever is moved beyond the shoulder of a latch 22'! pivoted on a bracket on the case M", whereupon a spring 222, tensioned between said latch 22? and the lever 223, immediately urges said latch counter-clockwise to cause the shoulder thereon to move over the stud 226 to lock the lever 223 in depressed position. Aiingerplece 229 on the upper end of the latch 22? provides means for disengaging the shoulder of said latch from the stud 22B and when said latch is thusdisengaged the spring 228 returns the lever 223 upwardly to ineffective position as here shown.

Machine locking mechanism Mechanism controlled by the traveling carriage is provided for locking the machine starting bar against depression when thetraveling carriage is out of columnar position.

Secured on the frontof the traveling carriage 30 (Fig. 1) is a tabulating stop bar 230, which ad- I ent totalizers for addition and select the balance the cross frames of the machine.

When the lever 223 is depressed, the fiat surface of a stud 226 carried by link 23% to a crank 22? fast on a shaft 232 journaled in the frames i 25 and I05. Also secured on the shaft 238 is an arm 239, the upper end of which engages a stud 24!! in an extension of a lock plate 24!, fulcrumed on a stud 242 in the frame I05.

When the traveling carriage is out of columnar position a spring 242, stretched between the plate 24! and a lock lever 243, also free on the shaft 242, urges said plate 24! counter-clockwise to maintain a locking shoulder 244 thereon in the path of a square stud 245 in the plate I29 to obstruct counter-clockwise releasing movement of said plate when the starting bar I28 is depressed. Moving the traveling carriage to any columnar position (Fig. 1) causes the lug 234 to engage the lever 235 to rock said lever clockwise, which movement by means of the link 236 (Fig. 14) rocks the crank 23?, the shaft 233, and arm 239 counterclockwise, and the locking plate 24! clockwise to move the shoulder 244 out of the path of the stud 245, to free the plate I29 for releasing movement. 7 Other means, presently to be described, is provided for controlling the locking plate 24!.

M echanism to lock the machine against operation when the journal sheet is exhausted Mechanism is provided for locking the machine starting bar against. depression when the lower end of the journal sheet passes a certain point. This notifies the operator that the journal sheet is about'exhausted, so that a new one may be substituted therefor.

A journal sheet 245 (Figs. 1, 8 and 15), lon enough to receive all the entries for a certain business period, is threaded around the platen roll 44 by means of the guide plate 36 and is retained in contact with said platen roll by auxiliary pressure rollers 24?, which are independent of the pressure rollers it for the ledger sheets, and remain effective when the throat of the front-feed carriage is open to hold the journal sheet against displacement at this time. The ledger sheet 246 cooperates with two feelers 248, only one-here shown, fast on a shaft 249 journaled in the platen frame end plates 32 and 33 (Figs. 6 and 8).

Also secured on the shaft 249 are two arms 255 (Fig. 14) only one here shown, slotted to embrace studs am similar arms 25'! and 258 (Figs. 3

.and 14) pivoted respectively on the plates 32 and 33. The arms 251! and 258 support a rod 259 which extends the full length of the traveling carriage and whichis arranged to cooperate with a bent-over portion 252 of an arm 26!v secured on one end of a sleeve 252, free on the shaft I25. Secured on the other end of the sleeve 262 is a hook-shaped arm 263, having a slot which cooperates with a stud 264 in one arm of a three-armed lever 255, free on the stud I43 and having a stud in one'arm thereof which is embracedby the slotted end of a lever 2B6 fulcrumed on a stud 26! in the frame I05. When the journal sheet is in contact with the feelers 248 said feelers are retained in'full-line position as shown in Fig. 15,

and by means of the arms 252 position the arms 25'! and 258, as shown in Fig. 14, to cause the rod 259 to position its associated parts, as here shown, so that a forward extension of the lever 266, in cooperation with a stud 258 in anextension of the lock lever 243, retains'a shoulder 289 of said lever out of the path of the stud 245 to permit depression of the starting bar I28.

When the lower end of the journal sheet 24 (Figs. 14 and 15) moves beyond the feelers 248,

said feelers move counter-clockwise, under the influence of a spring 210, into corresponding openings in the table 36 to the dot-and-dash position shown in Fig. 15'. The arms 251 and 258 move in unison with thefeelers 248 to withdraw the rod 259 from the bent-over portion of the arm 281 to free said arm and associated parts to the action of a spring 211, one end of which is connected to an extension of the lever 265. The spring 211 rocks the lever 266 counter-clockwise to permit the spring 242 to rock the shoulder 269 into the path of the stud 245, to block releasing movement of the plate 129. When a new journal- .turning the lever 243 to ineffective position.

Normally a lever 212 pivoted at 213 to the plate 32 is in the position shown in full-lines in Fig. 14, Where a notch 214 therein is opposite a stud 215 in an extension of the lever 251, and consequently said lever 212 does not interfere with clockwise movement of said arm 251, when the end of the journal sheet 246 passes beyond the feelers 248 (Fig. 15). If it is desirable to continue operating the machine after the end of the journal sheet has passed beyond the feelers 248, moving the lever 212 clockwise causes a camrning surface 216 thereon, in cooperation with the stud 215, to return the arms 251 and 258 and the rod 259 counter-clockwise to the position here shown. This return movement of the rod 259 through the train'of mechanism shown in Fig. 14 restores the lever 243 to ineffective position.

It will be recalled, that at the time the throat of the front-feed carriage is opened the shaft 56 (Figs. 6, '1 and 14) is rocked clockwise as here shown, which by means of a stud 211 in a crank 218 secured to said shaft, in cooperation with a camming surface 219 on the lever 212, returns said lever to ineffective position, when the notch 214 is opposite the stud 215, thereby causing the lever 243 to again become effective when the throat of the carriage is closed to remind the operator that the end of the journal sheet is approaching the printing line. A spring 280 normally retains the lever 212 in ineffective position.

The mechanism described above also operates to lock the machine against operation when the throat of the front feed carriage is .open. Rocking the platen carrying frame to front feed posi- Tabulatin g and vertical feeding mechanisms During normal operations the travelingcarriage is automaticallyt'abulated from one column to the next, near the end of each operation. However, there are times when it is desirable to prevent tabulation of the traveling carriage and to simultaneously cause the platen roll to be rotated to line-space the ledger and the journal sheets. To this end a vertical feed starting bar 281 (Fig. 2) is provided, which when depressed, causes the machine to operate in the normal manner, with these exceptions: Automatic tabulating mechanism is rendered ineffective and the platen roll feeding mechanism is simultaneously rendered effective.

Directing attention to Fig. 2, an extension 282 of the lever 132 carries a stud 283 upon which is pivoted a link 284, the upper end of which is bifurcated to receive a stud 285 in the forward end of a lever 286 free on a stationary stud 281. As previously explained, depressing the starting bar 128 rocks-the lever I32 clockwise to initiate operation of the machine, which movement of said lever by means of the link 284 permits the lever 286 to be spring-urged counter-clockwise to cause an upward extension thereof to engage a projection 288 of a tabulating control bar 289, mounted in a slotted stud 290 secured in the printer framework, and rock said bar outwardly, as here viewed, against the action of a spring 303. This rocking of the bar 289 moves a footshaped extension 302 thereof away from a stud cally tabulate from one columnar position to the next, near the end of machine operation.

Before the link H6 completes its downward movement the hook 293 rides off the stud291,

permitting the bar 292 to be spring returned upwardly to the position here shown, whereupon restoration of the lever 132, counter-clockwise, near the end of machine operation, restores the -lever 286 counter-clockwise to permit the'bar 289 to be returned by the spring 303, to the position here shown where the foot-shaped extension 302 thereof will protect the stud 291 from the hook 293.

The stud 283 in the extension 282 also ex causes a stud 294 in the stem thereof, in cooperation with an extension of a lever 295 free on the stud 133, to rock said lever clockwise against the action of a spring 298 to move an arcuate surface 291, on said lever, beneath the stud 285 to obstructcounter-clockwise movement of the lever 286. This permits the bar 289 to remain effective, as shown in Fig. 2, so that the extension 302, thereof will protect the stud 291 from the hook 293; therefore, during up and down movement of the link 116 the hook 293 rides idly on the sole of the foot-shaped extension 302 and as no tabulating movement is imparted to the bar 292 the traveling carriage remains stationary.

The vertical feed starting bar 281 also renders the mechanism effective that line-spaces the platen. An arm.298 free on the stud 281 is yieldingly connected to the lever 286 by a spring 299,

which urges a shoulder on said arm 298 into contact with a stud 305 in said lever 286. It is therefore obvious that upon depression of the motor bar 128 the lever 286 and the arm 298 move counter-clockwise in unison, causing an upward extension of said arm 293 in cooperation with a stud 306 on a bar 301,.slidably mounted in the framework of the machine, to shift said bar forwardly. Forward movement of the bar 301, by

5 means of a right angled extension 308 on the lit? 15 in said pawl out of the path of a stud 30! in the arm H2. Consequently the oscillating movement of said arm I72, during machine operations, imparts no movement to the sleeve 3I2, whereupon the platen line-spacing mechanism is rendered inoperative, as this sleeve controls the operation thereof. I

Secured on the sleeve 3I2 (Fig. 2) is an arm ti l having pivoted thereto an arm 315 upon which is adjustably mounted a platen feed hook 245 3H6, a downwardly extending portion Sii'oi' which is adapted to cooperate with the curled.

over lower edge of a ball 3 I 3 secured to a plurality of arms 3113 free on the shaft 37. An extension of the extreme left-hand arm 3w (Fig. 11)- car- 30 ries a stud 323, which cooperates with a curved slot in a link 3.2i, connected to an arm 322, loose on the platen shaft 63. Mounted on-the arm 322 is a feed pawl 323 urged counter-clockwise by a spring 323, so that the tooth of said pawl normally 35 engages the teeth of a ratchet wheel 325 integral with the platen roll 43.

As previously explained, depressing the vertical feed starting bar 28I (Fig. 2) causes the arm 295 to obstruct counter-clockwise movement of the lever 286 and the arm 2%, and as a result the bar 337 will not be moved forwardly to rock the pawl 3i 0 out of the path of the stud 3G I. Initial movement counter-clockwise of the printer shaft H9 and the arm I I2, during machine op- 45 eration, causes the stud 30I to by-pass the end of the pawl em, and return movement of said shaft and said am I72 causes the stud 3m to engage the notch 300 to rock the arms 3 and 3M clockwise, as viewed in Fig. 2, to shift the arm 50 3I5 and the hook 356 downwardly. Downward 55 and counter-clockwise, as viewed in Fig. 11.,

movement of the arm 3 I 5 and the hook 3 I 6 causes the bent-over extension 3I'I in cooperation with the curled edge of the bail 3I8, to rock said bail and the arm 3I9 clockwise, as viewed in Fig. 2,

Counter-clockwise movement of the extreme lefthand arm 3I9 (Fig. 11) causes the'stud 320 in cooperation with the link 32I to rock the arm 322 counter-clockwise, contrary to the action of a 60 spring 326, whereupon the pawl 323 engages the ratchet 325 to rotate the platen r011 44 counterclockwise in unison with said arm 322 to linespace the ledger card and the journal sheet.

When the arm "2 (Fig. 2) nears the end of 65 its return movement counter-clockwise the stud 30 I rides out of the notch 300, thereby permitting a spring 321 to return the arms 3I I, 3I4 and 3I5 counter-clockwise to normal positions, as here shown. A spring 328 (Fig. 11) returns the bail 70 3I8 and the arm 3I9 in unison with the arm- 3I5 and the hook 3I6, and the spring 326 simultaneously returns the arm 322 and the pawl 323 to normal positions, as'here shown.

The platen roll 44 is retained in position by 75 means of the teeth of the ratchet 325 (Fig.

in cooperation with a roller 329 mounted on an arm 330, free on a stationary stud 33I, and urged counter-clockwise by aspring 332 to yieldingly engage said roller 323 with the teeth; of the ratchet 325.

Each tooth of the ratchet 325 (Figs. 10 and 11) represents one line-space on the platen roll 44 and full movement of the arm 322 causes the pawl 323 to advance the ratchet and the platen roll three tooth spaces to tripple-space the record material. In order to control the number of linespaces that the platen 44 is rotated, means is provided for controlling the moment of engagement of the pawl 323 with the teeth of the ratchet 325. This controlling means is manually adjustable to three positions, single, double, and triple line spacing positions.

Free on the shaft 43, (Figs. 10 and 11) is a manipulative lever 333, having an arcuate surface 334 which-cooperates with a stud 335 inthe .pawl

323. The lever 333 is adjustable to three positions and these positions are determined by three notches in the periphery thereof, in cooperation with the tooth 336 of a retaining pawl 33! fulcrumed on a stationary stud 338. The spring 332, which is tensioned between the arm 333 and the pawl 33?, yieldingiy urges the tooth 333 into engagement with the notches in the lever 333:

With the lever 333 in any of its three positions, return movement of the arm 322 causes the stud 335 to ride up an inclined surface onto the arcuate surface 338 to disengage said pawl from the teeth of the ratchet 325, so that the platen roll 34 may be revolved in either direction by hand. When the lever 333 is in its first position, as shown in Fig. 10, the pawl 323 is allowed to engage the ratchet 325 at the earliest moment, upon feeding movement of the arm 322, and consequently picks up three teeth of said ratchet teeth to triple linespace the platen 44. Moving the lever 333 to its second position delays the moment of engagement of the pawl 323 with the ratchet 325 and consequently said pawl picks up only two teeth of the ratchet 325 to double line-space the platen roll. Moving the lever 333 counter-clockwise to its third position further delays the moment of engagement of the pawl 323 with the ratchet 325 thereby causing the platen roll to be single linespaced.

The slot in the link 32I (Fig. 11) moves out of operative relationship with the stud '32il,'when the platen is moved to front feeding position, and as a result the mechanism just described is rendered ineffective to rotate the platen 44. To remedy this condition, mechanism which functions automatically when the platen is moved to front feeding position has been provided to rotate the platen roll 44 to line-space the record material wound therearound.

When the platen 44 is moved upwardly to front feeding position a roller 333 (Fig. 11) on the arm 322, engages an arcuate surface 340 on an arm 34! of a bracket 342, secured on the frame of the carriage 30 (see also Figs. 8 and 9), and the contour of the surface 340 rocks the arm 322 counter-clockwise torotate the platen 44 to linespace the record material wound therearound. The curved slot in the link 32I permits said link and the arm 322 to move independently of the arm 3I9 when the platen is rocked to front feeding position.

A fourth position of the lever 333 (Fig. 10) moves the surface 334 thereon in relation to the stud 335 so that during oscillation of the arm 322 (Fig. 11) said stud 335 willnot ride off of said surface 334 and as a result the pawl 323' is retained out of engagement with the teeth of the ratchet 325 to disable the automatic line-spacing of the platen 44.

A manipulative friction lever 355 (Fig. 2)., pivoted on a bracket I fast to the keyboard plate, is provided for holding the lever 255 in its upward position (as here shown), to render the automatic tabulating mechanismineflective and the line-spacing mechanism effective regardless of which starting bar is'used to initiate machine operation.

The lever terminates in a flngerpiece which protrudes through an opening in the keyboard plate. As here shown, a hook-shaped projection 352 of the lever 355 is out of the path of the stud 285 and consequently said lever has no control over the lever 236.

Moving the lever 355 counter-clockwise to e1 fective position causes the projection 352 to engage the stud 235 to retain the lever 255 against downward or counter-clockwise movement.

Front feed guide chute -A guide chute has been provided for guiding the ledger sheets around the platen when inserted in the open throat of the front feedplaten. This mechanism also serves as a line finding device for properly locating the ledger sheet or other material inserted in the throat, in relation to the printing line. When the platen and its rockable frame are in printing position the guiding mechanism is retained in a position where it will not obstruct the view of the printing line. The rocking of the platen away from printing position to open throat position moves the guiding mechanism to'a position where it will properly direct material around the platen roll and to where the line finding device is effective to locate the record material in relation to the printing line.

Referring to Figs. 6, 7, 8 and 9,- pivoted on the platen shaft 43, just inside the platen end'plates 32 and33, are arms 343 and 344 carrying at their upper ends rollers 345 and 346 projecting into angular slots 341 and 345- formed in brackets 349 and 342, secured on the traveling carriage frame 30. The arms 343 and 344 are connected by a guiding bar 355, which is secured to right-angled surfaces formed on said arms 343 and 344. Adjustably attached to each end of the bar 355 are lateral guides 355 and 351, the lateral location of which may be changed in relation to the platen 44 to accommodate different widths of ledger sheets. The rocking of the platen away from printing position (Figs. '1 and 9) and the cooperation of the rollers 345 and 345 with the angular slots 341 and 343 change the position of the arms 343 and 344 so that the bar 355 and lateral guides 355 and 351 are tilted into alinement with a front feed guide table 355, which extends the width ofv the platen 44 and is secured to the platen frame end plates 32 and 33. Adjustably mounted on the table 353 are rear lateral guides 353 (Figs. 8 and 9) the lateral locations of which may be shifted to conform to the locations of the front guides 355 and 351.

When the platen 44 is in open-throat position as shown in Fig. 9, the top edge of the bar 355 isso positioned, in relation to the printing line, that it serves as a line finding device for locating the ledger sheet in relation to the printing line.

a It will be recalled that when the platen is in front feeding position the pressure rollers 15 (Fig. 9) are disengaged therefrom, thereby permitting ledger sheets to be inserted within the .lateral 'guides 355 and 351 and simply pushed platen is closed, the space just below the printing on said ledger sheet will be in alinement with the type carriers.

The line-spacing of the platen or the printing of a large number of numerals at one time, have a tendency to rock the platen slightly out of printing position. To overcome this tendency a spring-pulled restraining pawl 365 (Figs. 8 and 11) pivoted on the bracket 342, is provided, which in cooperation with the roller 345 creates sufllcient resistance to hold the platen 44 and its carrying frame in printing position under the above conditions.

Auxiliary starting an At times it is desirable to have the throat of the front i'eedcarriage open without depressing any of the control keys or the overdraft or suboverdraft keys, and to this end an auxiliary starting bar has been provided, depression of which renders the throat-opening mechanism eflective and simultaneously sets the machine in motion,

this latter being necessary to-actuate the auto-- matic throat-opening mechanism. It will also be recalled that when the traveling carriage is out of columnar position the machine releasing mechanism is locked against operation and moving the traveling carriage into columnar position renders this look ineffective. Depressing the aux: iliary starting bar also renders the above locking means, for the machine releasing means, ineffective making it possible to operate the machine and the automatic throat-opening mechanism irrespective of the columnar position of the traveling carriage. The auxiliary starting bar and associated mechanism will now be described.

Calling attention to Figs. 2, 3 and 12, an auxiliary starting bar 36I is mounted adjacent the sub overdraft key 254 and the lower end of said bar is pivotally connected to a bar 362 slldably mounted by means of parallel slots therein, in cooperation with studs 363 and 354 in a plate 365 secured to the frame I35 by means of various studs and screws. A spring 356 (Fig. 12) tensioned between the stationary stud 353 and the bar 362 urges said bar and the auxiliarystarting bar 36I upwardly to undepressed position, which is determined by the slot in the upper end of the bar 352 in coperation with the stud 353.

Depressing the auxiliary starting bar 36I (I'lgs.

2 and 16) through the medium of a stud 351 therein, in cooperation with an arm366 secured on the shaft I11 rocks said shaft and the lever I16 counter-clockwise, causing the stud I15 to rock the latch I42 outof engagement with the stud I44, to permit the notch I22 in the link I23 to be engaged by the stud I2I upon subsequent operation of the machine.

' wise movement of the lever 392 shifts the yoke by the associated mechanism, here shown, to stops mounted on the traveling carriage, which rock the locking plate 241 to ineffective position when the traveling carriage is in predetermined columnar positions. In addition to rendering the automatic throatopening mechanism efiective and unlocking the release plate 129, depressing the auxiliary bar 361 also sets themachine in motion to cause the shaft 119 (Fig. 16) to actuate the throat-opening mechanism in the manner explained previously.

Depressing the auxiliary starting bar 361 (Fig. 12) carries the bar 362 downwardly in unison therewith to move a notch 313, in said bar, opposite a bent-over ear 314 on a bell crank 315 fulcrumed on the stud 364' thereby permitting a spring 310 to rock saidbell crank clockwise, to engage said ear with said notch. Clockwise movement of the bell crank 315 causes a stud 311 therein, in cooperation with an extension of a multi-armed lever 318 free on the shaft 133, to rock said lever counter-clockwise against the action of a spring 319. Counter-clockwise movement of the lever 318, (Figs. 12 and 13) causes an,

arm thereof, in cooperation with an extension 331 of a link 382, to shift said link upwardly. The lower end of the link 382 is connected to an arm of a yoke 393 free on a rod 38 3 supported by a yoke 385 loose on a rod 398 supported by a bracket 389 secured to the base 34, and the upper end of said link 302 (Fig. l.) is pivoted to a lever 396, fulcrumed on a stud 381 in the case 31.

An arm 390 (Figs. 12 and 13) of the yoke 383 is pivotally connected, by a toggle link 391, to a a cam lever 392, having a cam slot 393 which cooperates with a .roller 394 mounted on the motor framework 114. A strong spring 395 normally maintains a raised surface of the link 39! in contact with an extension of the arm 390.

Upward movement of the link 383, which is eifected as explained above, by depressing the auxiliary starting bar 361, rocks the yoke 333 counter-clockwise on its pivot rod 334, the yoke 385 being restrained against moving in unison with said yoke 383 by a spring 396, which normally maintains the rod 384 in, contact with an extension 391 of the bracket 339. Counterclockwise movement of the yoke 333 shifts the lever 392 upwardly, causing the cam slot 393, in cooperation with the roller 394, to move a roller 398, mounted on the lower end of said lever 392,

into the path of a cam block 399 secured to the clutch driving member H3, which it will be recalled is geared to the constantly running electric motor I01.

During revolution of the driving member 113, the segment 399 engages the roller 398 and rocks the lever 392 clockwise, the roller 3 94, in cooperation with the slot 393, serving as a fulcrumfor said lever. As the spring 395 is sufliciently strong to overcome the action of the spring 399, clock- 383 rearwardly to rock the yoke 385 counterclockwise, which movement, by means of a link 400, the lower end of which is pivoted to an extension of the yoke 385 and the upper end of which is slotted to receive a stud 401' in an arm Consequently clockwise movement wise to release the machine for operation in the manner explained in connection with Fig. 2.

- In case the plate 129 (Fig. 12) is held against counter-clockwise releasing movement, for example, when the lock lever 243 (Fig. 14) is rendered effective, either by the journal sheet being exhausted or by the platen being in front feeding position, the flexible connection formed bythe toggle link 39l and the spring 395 permits the lever 392 to move independently of the yokes 383 and 385 when the cam segment 399 contacts the roller 398, thereby preventing injury to the parts comprising this mechanism. When the machine is set in motion by means other than the auxiliary starting bar 3BI, counter-clockwise releasing movement of the plate 129 causes the stud 40| to move idly in the slot in the upper end of the link 400, without imparting any movement to said link and its associated parts.

The auxiliary starting bar 361 (Fig. 12) is retained in depressed position during machine operations by the ear 314 of the bell crank 315, in cooperation with the notch 313. Initial movement counter-clockwise of the main shaft 109 of, in cooperation with the stud 311 rocks the bell crank 315 counter-clockwise to disengage the ear 314 from the notch 313 to permit the spring 356 to return the auxiliary starting bar 361 upwardly to undepressed position. When the stud 406 moves beyond the shoe 408 the ear 314 comes to rest on the edge of the bar 362.

Novel non-repeat mechanism has been pro vided for preventing repeat operations of the 0 machine when the auxiliary starting bar 361 is accidentally or inadvertently retained depressed at the end of machine operations.

The non-repeat mechanism includes an arm 459 pivoted at 424 to the plate 305 and urged clockwise by a spring 410 into contact with a stop stud 4i 1, which positions an abutment 404 of said arm in the path of the bent-over ear 314 of the bell crank 315. Pivoted on the bar 362 is an arm 412 urged clockwise by a spring 4I3, to normally cause a hump thereon to resiliently obstruct the notch 313 from entrance of the ear 314, and to maintain a bent-over car 414 thereofv in engagement with a notch M5 in the arm 409.

Depressing the auxiliary starting bar 361, and incidental downward movement or the bar 362, causes the ear 414 to engage the bottom of the slot 415 to rock the lever 409 counter-clockwise out of the path of the ear 314. When the notch 313 moves opposite the ear 314 clockwise movement of the bell crank 315, under influence of the spring 316, causes said ear to rock the arm 412 counter-clockwise to disengage the ear 414 from the slot 5 to release the arm 409 to the action of the spring 410, which tends to return said arm 409 in a clockwise direction, but is prevented from doing so by the ear 314 which overlies the abutment 404.

If the bar 361 is retained depressed'at the end of machine operation, return movement counterclockwise of the bell crank 315 removes.- the ear 314 from the notch 313 and from above the surface 404 to permit the arm 409 to be spring-re id'dedin one or more of the adding totalizers.

shown, (Fig. 1) located in predetermined col-- umnar positions on the bar 230, in cooperation with an upturned projection ll! of the lever 386, rock said lever counter-clockwise when the trayeling carriage is tabulated to said predetermined columnar positions to lift the link 382 (see also- Fig. 12) to cause the machine to operate automatically in exactly the same manner as when the auxiliary starting bar I is depressed. However, this mechanism does not disengage the latch 2 (Fig. 16) and consequently the automatic throat opening mechanism remains inoperative when the machine is thus operated.

Operation It is believed that an understanding of the mode of operation of the present machine will have been obtained froma perusal of the fore going specification, however, it is felt that a brief.

outline of the sequence of operation will not be amiss at this time.

First the auxiliary pressure rollers 2" (Figs.

7 and 15) are manually swung clear of the platen roll, and the journal sheet 246 and its superimposed carbon paper are inserted at the back of the platen and guided by the table 30 are wound around the platen roll until the upper end thereof passes beyond the auxiliary pressure rollers 241, after which said auxiliary pressure rollers are returned to eflective positions, as shown in Fig. 15. Inserting the journal sheet in the machine moves the feelers 248 from the dot and I dash position, shown in Fig. 15, to the full line position, which movement, bymeans of the mechanism pictured in Fig. 14, moves the latch lever 243 to ineffective position. As previously stated, the journal sheet is long enough to receive all the entries for a certain business period; for example, one day. 1

Next the operating motor is switched on, and runs continuously while the machine is in use. If the front feed throat isn't open the operator depresses the auxiliary starting bar 36! (Fig. 2) to open said throat. Next the first ledger sheet 4| 8 (Fig. 1) is removed from a. conveniently located stack, inserted within the open-throat and adjusted in relation to the printing line by means of the line-finding device, after which the throat .is closed by depressing the bar I00 (Fig. 6).

With the traveling carriage in its extreme right hand or starting position' the old balance of this particular customer is ascertained from the last entry in the right-hand column of the ledger sheet, set up on the amount keys, after which an operation of the machine is initiated by depressing the starting bar I28. Duringoperation of the machine the old balance is printed in the first column of the ledger sheet and simultaneously added into the previously cleared balance totalizer, and if desired may be simultaneously After this operation the traveling carriage tabulates automatically to the credit column. Ne

the first charge or debit item is set up on the keyboard, and upon operation of .the machine is printed in the debit column and simultaneously subtracted from the old balance, contained in the balance totalizer. If more than one debit item is to beventered in the debit column the vertical feed starting bar 2" (Fig. 2) is used to initiate operation of the machine. This prevents tabulation of the traveling carriage and causes the carriage to tabulate automatically to the credit column on the ledger sheet 8.

Next the first credit item is set up on the keyboard, and upon operation of the machine this item is printed upon the ledger and journal sheets and simultaneously added to the amount contained in the balance totalizer. If there is more than one credit item, the vertical starting bar III is used in exactly the same manner as explained for a plurality of debit items. After all the credit items have been entered, the traveling carriage automatically tabulates to the balance column of the ledger sheet.

- The No. 1 total or balance key H1 (Fig. 3) is then depressed to select and condition the bal-- ance totalizer for a clearing operation and the machine is released for operation by depressing the starting bar I28. During operation of the machine, the #1 or balance totalizer is cleared and the new balance is simultaneously printed in the balance column of the ledger sheet 8 and upon the journal sheet. Depressing the #1 total key renders the mechanism shown in Figs. 3 and 16 efiective to cause the throat of the front feed platen to open automatically at the end of a balance operation so that the ledger sheetmay be remoyed and a new ledger sheet inserted in the open-throat. At the end of balance operations the traveling carriage tabulates automatically a slight distance beyondthe balance column to render the automatic return mechanism effective, which immediately returns said carriage to starting position.

If the balance totalizer is in an overdrawn condition after the debit and credit items have been entered therein, the operator is notified of this fact by the locking of the No. 1 total key against depression and the same mechanism that locks the No. 1 total key unlocks the overdraft and sub-overdraft keys l19and 204. If'no further computation is necessary in this particular account, the operator depresses the overdraft key lll, which conditions and initiates an overdraft operation during which the complementary amount of the overdraft is transposed to a true negative amount and printed upon the ledger and the journal sheets.

In the mode of operation being described, there is no necessity for further computations in connection with an overdrawn account; however, in systems requiring further computation in connection withoverdrawn accounts, depressing the sub-overdraft key 204 initiates a sub-overdraft operation during which the complementary amount of the overdraft is transposed to a, true negative amount and printed upon the ledger and journal sheets and the complementary amount of, the overdraft is reentered in the balance toin connection with this particular account.

The machine embodying the instant invention is very flexible in nature, and for that reason is adaptable for use in connection with the various systems employed by the majority of presentday business establishments. Therefore it is not the intention or desire to limit this machine to any particular business or to any particular business system.

While the form of mechanism herein shown 'and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

What is claimed is: v

1. In a machine of the class described, the combination of a traveling carriage having a rockable platen adapted to be rocked from working position to open-throat position for the insertion and removal of record material; main "operating means; normally ineffective means operated by the main operating means while the carriage remains stationary to rock the platen to open-throat position; devices to control operations of the machine; and means under the sole control of the control devices to render the rocking means effective to cause the throat to open.

2. In a front feed machine of the class described, the combination of a traveling carriage;

a rockable platen supported by the traveling carriage, said platen adapted to be. rocked from printing position to front feeding position for the removal and insertion of record material; means to rock the platen to front feeding position; means to operate the rocking means; manipulative devices to condition the machine for various operations; and means rendered effective solely under control of the manipulative devices to connect the rocking means tov its operating means to cause the platen to be rocked to front feeding position. u

3. In a.front-feed machine of the character described, the combination with a traveling carriage and a platen supported by the traveling carriage, said platen movable from printing position to open-throat position to facilitate the removal and insertion of record material, of means to move the platen to open-throat position; means to operate the moving means; means to connect the operating means to the moving means; control devices for the machine to determine the type of operation to be performed; and means settable by the control devices to selectively render the connecting means eifective to cause the platen to be moved to openthroat position during certain types of machine operations regardless of the position of the carriage. a

4. In a front-feed machine of the class described, the combination with a traveling carriage and a platen supported by the traveling carriage, said platen movable from printing position to a more accessible position to facilitate the removal and insertion of record material, of means to move the platen to its more accessible position; means to operate the moving means; means to connect the moving means to the operating means; means to retain the connecting ,means in ineffective position; machine control 5. In a front-feed machine of the class described, the combination with a traveling carriage, a rockable platen carrying frame supported by said traveling carriage, and a main operating mechanism, of means, normally disconnected from said main operating mechanism but adapted to be operated thereby during a regular cycle thereof, for rocking the platen frame from a normal position to a front feeding position to facilitate the removal and insertion of record material; machine control devices; and. means rendered effective by the machine control devices to-connect the rocking means to the main operating mechanism to cause the platen frame to be rocked to front feeding position during an operation of the machine in which-certain of the machine control devices are in operated position.

' 6. In a front feed machine of the character described, having a traveling carriage, comprising a portion movable from a normal position to a more accessible positionto permit ready removal and insertion of record material, the combination of a main operating mechanism; a member adapted to be given a definite movement by said main operating mechanism during each operation of the machine; a contrivance connected to the carriage-and yieldingly urged into engagement with the member; means to hold the contrivance out of engagement with the member; a plurality of elements for controlling operation of the machine; and means controlled by said elements to'render the holding means inefiectiveto permit the contrivance to engage the member to cause the movable portion of the carriage to be moved to its more accessible position.

7. In a front feed machine of the class de-= scribed, the combination with operating mechanism for the machine, a traveling carriage .and a rockable platen supported by said carriage, said platen normally in printing position but adapted to be moved to a more accessible position to facilitate the removal and insertion of record material, of a member adapted to be given a definite cycle of movement upon each operation of the operating mechanism, platen rocking means adapted to be operated by the member, said platen rocking means comprising an element engageable with the member; means to hold the element out of engagement with the member; manipulative devices to control operation of the .machine; and means rendered effective by the position for the removal and insertion of record material; means to operate the rocking means;

normally ineffective means to connect the operating means to the rocking means; and means independent of the record material supporting means to render the connecting means efiective to cause the platen to be rockedto its more accessible position.

9. In a machine of the character described, the combination of record material supporting means, including a rockable platen; means to 

